The challenge presented by the prospect of superintelligence, and how we might best respond is quite possibly the most important and most daunting challenge humanity has ever faced. And-whether we succeed or fail-it is probably the last challenge we will ever face.
Nick BostromFor healthy adult people, the really big thing we can foresee are ways of intervening in the ageing process, either by slowing or reversing it.
Nick Bostrom